{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["manufacturing standard", "engineering feature", "application", "machine or equipment", "process parameter"], "input": "As for HT2 , the microstructure of heat affected zone was composed of B2 + α2 + rim-O + primary O + acicular O in the region close to the base metal , B2 + intergranular α2 + transformed O + primary O + acicular O in the region close to the fusion zone ."}
{"manufacturing standard": [], "engineering feature": [], "application": [], "machine or equipment": [], "process parameter": []}